Recent content by Thomas_A

I guess curves get misunderstood and mixed up once they are published and spread around on the internet. There are Harman target curves for headphones, and there are curves for a typical room response with good speakers etc. The expressions "target curve" and "Harman" get mixed up and the story...

You can EQ a suboptimal speaker based on its anechoic response. If your speaker is good from start there is no point in using correction above Shroeder f.

If you have a natural sound source in your room in front of you like your own voice, would you like to alter it according to a room curve to sound "not like you" in that room?

Done testing. I did not find any tells this time either. I would really like to see this 20-trial experiment repeated in 10 successive sessions. If anyone of them get 18/20, I might believe it.

Seeing the graphs, I think it is "impossible" for IMD effects as well. The difference and levels are just way too small. One could perhaps try too boost the response 20-30 dB at 21-22 kHz to see if it becomes audible, and then give the blame for the headphone having a similar boost...

Thanks, the lastest year has been just crazy; open surgery in chest and stomach. The report from the doctors today told me I was in a real mess;. massive inflammation and close to sepsis. Strange what a small gall bladder can cause.

Back from hospital, just downloaded and made a few listening comparisons. No "tells" so far what I can hear, specifically trying to hear if there is some IMD that could change some timbre. I'll do some more tests tomorrow.

7-8 degrees C diff should give quite some effect with your cartridge. From Yosh pages: http://www7a.biglobe.ne.jp/~yosh/recspecs.htm

Well see tomorrow if I find something. Most likely not since my previous attempts with HF IMD did not give anything. At least what I remember. Have a bit better equipment now however. To work ear canal must be loaded with 21 kHz, combined with 14 kHz to give an audible 7 kHz buzzz.

Both used Susvara?

Thanks. Good info for others to try ABX.

Interesting. If the time spot is known it will be easier for others to test it. I’ll try later this week.

There will always be outliers, for various reasons though. I wonder if it is only with Susvara HP it is heard? Pressuring high enough HF into the ear canal might introduce non-linearities and perhaps some ear IMD. Not cheating but possible explanation besides hearing 21 kHz.

The only way would be IMD either equipment or ear. I’ve never heard or read of HF Tartini tone audibility though. http://szhorvat.net/pelican/combination-tones.html

I remember talking to Arny K (RIP) way back when I detected one of his impossible tests, and later found it was the usual soundcard IMD. I played a while with the ears own IMD, Tartini tones. While they where fun, I don’t remember if I ever got to conclude if they have any role at higher...